Furnace-grate.



H. MASON.

-FURNACE GRATE. APPLICATION FILED APB. 16.3911.

IN VE/V TOR Patented Nov. 5, 1918.

UNITED STATES PATENT OFFICE.

HOWARD MASON, OF AMSTERDAM, NEXV YORK.

FURNACE-(ERNIE.

essee).

To all whom it may concern:

Be it known that I, .HOWARD MASON, a citizen of the United States, residing at Amsterdam, county of State of New York, have invented certain new and useful Improvements in Furnace- Grrates, of which the following is a specification. Reference may be had to the accompany: ing drawings, and the reference characters marked thereon, which form a part of this specification. Similar characters refer to similar parts in the several figures therein.

This invention relates to improvements in furnace-grates, and in certain features relates more particularly to the type of traveling grate such as a chain-grate used in connection with mechanical stokers.

The principal object of the invention is to build up such a grate in such a manner that its parts can be readily removed and replaced.

Other vidc for expansion and contraction of the parts without causing undue stress or strain upon the grate-bars, and to facilitate the removal, as a unit, of with the complement ed upon the respective bar.

Other objects will with the following description. I

Figure l of the drawings is a view in side elevation of a grate embodying my inVention with the intermediate portion broken away and the furnace. walls removed.

Figs. 2 and 3 are views in perspective of finger-blocks detached, adapted to be mounted upon the outer ends of the respective grate-bars.

Figs. 4 and 5 are views in perspective of finger-blocks detached, adaptedto be mounted upon the inner ends of the respective grate-bars on opposite sides'of an intermediate chain.

Fig. (Sis a View in' perspective of one of the intermediate finger-blocks detached.

Fig. 7 is a vertical cross-.section of the grate taken on the broken line 7-7 in Fig. 1.

Fig. 8 is a view inperspect ve of a brokenaway portion of an intermediate chain.

7 Fig. 9 is a top plan view of the gratev as shown in F ig. l, partly broken away.

Referring to the drawings wherein the invention is shownin' preferred form I have shown in Fig. 9', three chains 1, 2 and 3, ar-

Specification of Letters Patent.

Montgomery, and

objects of the inventionare to pro-- appear in connection opening,

Patented Nov. 5, 1918.

Application filed April 16, 1917. Serial no. 162,332.

ranged side by side passing over sprocketwheels, 4, fixed upon the respective shafts, 5, which shafts are rotatively mounted in the usual manner in bearings on the furnace walls or frame, not shown. Each of these three chains has links provided with a transverse aperture, 6.

series of rectangular bars, 7, is arranged between the chains, 1 and 2, with the bars respectively substantially alined with apertures, 6, in oppositely located links in the chains, 1 and 2, and a similar series of grate-bars is similarly arranged between the chains, 2 and 3.

These grate-bars, 7, are all detachably connected in the same manner with the respective chains, so that a description of one will suffice for all.

The grate-bar, 7, is provided in its opposite ends with openings, 8, adapted totelescopically receive a pin, 5) or. 10, inserted through anapertuie, 6, in the neighboring chain-link whereby the grate-bar is mounted at its opposite ends upon the chains between which itextends.

Mounted upon the respective grate-bars, 7, are a .plurality of ilHgGY-blOCkS, 11, 12, 1 3, 14 and 15, shown detached in Figs. 2. to 6, inclusive, each provided with a rectangular 16, adapted to receive the rectan- @tllahgrate-bar.

e finger-blocks, 15, are arranged in a series side by side longitudinally of the in termediate portion of the grate-bar. Endlocks, 11, are similarly mounted upon the outer ends of alternate gratebars, and endblocks, 12, are similarly mounted upon the outer ends of the other grate-bars.

Each of the end-finger-blocks, 11, 12. has an extension, 17, adapted to overhang and rest upon the neighboring chain and thereby prevent rotative movement of the grate-bar relatively to the chain-links upon which the ar is mounted.

The end finger-blocks, 13 and l i, are mounted upon'the inner ends of the respective grate-bars on opposite sides of the intermediatechain, 2, and they are formed with intermeshing teeth or fingers, 18, which overhang the -hain, 2.

The pin, 9, is removably inserted in the chain-link aperture. (3, and is held therein in telescoped engagement with the neighboring end of the grate-banby means of a cot ter-pin, 19, inserted through anamrture in an opening, 20, in the extension, 17, of the end-block, 11.

The pin, 10, may be ren'iovably inserted in the aperture, 6, in a link of the middle chain, 2, with its opposite ends in telescoped engagement with the respective alined gratebars on opposite sides of said chain, no cotter-pin being necessary in such case.

I have shown the sides of the several linger-blocks provided with longitudinal grooves, 21, and with grooves, leading therefrom through the fuel-supporting surface of the respective blocks, whereby when the blocks are ari'ai'iged side by side on the grate-bar, ventilating passages are formed between neighboring blocks.

To remove the grate-bar, the cotter-pin, 19, iswithdrawn and the pin, 9, is drawn out from the opening, 8, in the grate-bar, whereupon that end of the grate-bar can be .raised to bring it above the level of the chain, 1,-and the other end of the grate-bar can then be withdrawn from the pin, 10, and the, grate-bar with its complement of fingerblocks can be removed as a unit.

The finger-blocks can afterward be removed by sliding them longitudinally of the gratediar; and broken blocks can thus be readily replaced with new ones.

Where-,both of the outer chains, 1 and 3, are readily accessible for removal of the grate-bars in this manner, the pins, 10, may be permanently mounfiid upon the respecv tive links of the chain, 2.

lVliere one of the outer chains is inaccessibly lo rated. or where more than three chains are employed, the pins, 10, are removably mounted upon the links of the intermediate chains to permit them to be withdrawn tor the removal of successive longitudinally alined grate-bars.

As many chains may be employed as are necessary to secure the desired Width of grate.

The extensions, 17, on the outer endblocks on neighboring grate-bars preferably have intermeshing fingers, 23, and the we tensions of said end-blocks form a practi- Cally continuous shield tor protecting the outer eliaiii from the fuel and from excessive heat,-

The iiitermeshing fingers, 18, on the blocks, Band 14, serve to protect the intermediate chain, 2. s The facility with which the grate-bars and finger-blocks can be removed makes it possible to keep the grate in repair at com paratively low cost. I

The provision for ventilation and the f act that the fuel-engaging surface is made up of small integral parts lessen the tendency to warping and twisting of the grate-bars, and confine repairs practically to the fingerblocks which are the only parts of the grate in a like manner exposed to the fuel or to the furnace. In the preferred form of my improved grate, the grate-bar, 7, is limited'in' length to the space between the chains npon'whieh the grate-bar is supported,'so that the gratethe direct heat of bar does not overlap the chain at either.

projecting from opposite sides of the block,- Each of these fingers is adapted to mesh The intermediate portion of the grate f with or extend in between under adjacent fingers on the similar blocks of the next grate-bar.

What I claim as new and desire to secure by Letters Patent is i 1.. In a chain-grate and in combination, 1

a chain; grate-bars in substantial alinement endto end on opposite sides of "said chain severally supported at one end thereby; and I finger-blocks on the respective grate-bars,'

certain of the finger-bl0cks on one sideof said chain having fingers extending lon tudinally of the bar internieshing with gers extending longitudinally of the bar on certain of said finger-blocks on the other side of said chain to form a fire-shieldfor the chain.

2. In a grate, the combination with a grate-bar; of a plurality of finger-blocks mounted side by side longitudinally upon said grate-bar, said blocks beingp'rovided with longitudinal side-grooves and withside-grooves opening therefrom through the fuel-supporting surface of the blocks form-,

ing ventilating spaces between neighboring linger bloc-ks, said finger-blocks inclosing said longitudinal side grooves. y

3. In a chain-grate and in combination,

a pair of chains arranged side by side, one having. a link prov ded with an apert'ure' t-herethrough; a grate-bar extending between said chains; a pin inserted through said aperture in said chain-link in telescopic engagement with one end of said grate-bar, said pin being insertible and removable from the'side of said link-remote from Said" bar; means for detachably securiii said pin in teleseoped engagement with t l] e gratebar; and means for detachably connecting the other end of said grate-bar with; the;

other of saidvchains, a {1. Ina chain-grate'and in combinatiom a pair 0t chains arranged side by side, one.

having a link provided with an aperture therethrough: a grate-bar extending he tween said chains; a pin' detachablvinserted 1 through sai aperture in said ink having one ot'its endsin telescopic engagement with one end of said grate-bar, said pin beiiig iiiseitible and removable from the side of said link remote from said bar; a block on said grate-bar overhanging the other end of said pin and the chain carrying said pin, said block being provided in its overhanging end with an opening; and a cotter-pin inserted through said other end of said pin engageable with said opening in the overhanging end of said block.

5. In a chain-grate and in combination, three chains arranged side by side, the middle chain having a link provided with an aperture therethrough; a pair of longitudinally alined grate-bars extending between the middle chain and the respective outer chains in line with said aperture; a pin removably' inserted in said aperture with. its opposi e ends in telescopic engagement with the neighboring ends of said respective grate-bars; and means for detachably connet-ting 1" other ends of said grate-bars with the respective outer chains.

3. In chain-grate and in combination a pair chains arranged side by side; an angular grate-bar extending between said chains: a plurality of blocks provided with rectangular transverse openings adapted to receive said angular grate-bar longitudinally of which said blocks are arranged side by side, the utermost of'said blocks having an extension adapted to overhang and rest upon the neighboring chain; and means for detachably connecting said grate-bar with the respective chains.

7. In a chain-grate and in combination, a pair of chains arranged side by side, one having a link provided with an aperture therct-hrough; an angular grate-bar extending between said chains; a pin reinovably inserted through said aperture in said link in telescopic engagement with one end of said grate-bar, said pin being insertible and removable from the side of said link remote from said bar; detachable means for hold ing said pin in telcseoped engagement with said grate-bar; means for detachably conueeting the other end of said grate-bar with the other of saidchains; and a plurality of blocks provided with angular transverse openings adapted to receive said grate-bar longitudinally of which said blocks ara arranged side by side, the outermost of said block's having an extension adapted to overhang and rest upon the neighboring chain.

In testimony \vhereot', l have hereunto set my hand this llth day of April, i917.

lltHVAlll) MASON. 

